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</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div><div class="t-navbar-head"><strong class="selflink">日期和时间工具</strong><div class="t-navbar-menu"><div><div><table class="t-nv-begin" cellpadding="0" style="">
<tr class="t-nv-h1"><td colspan="5"> 函数</td></tr>
<tr class="t-nv-h2"><td colspan="5"> 时间操作</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/difftime.html" title="c/chrono/difftime"><span class="t-lines"><span>difftime</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/time.html" title="c/chrono/time"><span class="t-lines"><span>time</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/clock.html" title="c/chrono/clock"><span class="t-lines"><span>clock</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/timespec_get.html" title="c/chrono/timespec get"><span class="t-lines"><span>timespec_get</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv-h2"><td colspan="5"> 格式转换</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/asctime.html" title="c/chrono/asctime"><span class="t-lines"><span>asctime</span><span>asctime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/ctime.html" title="c/chrono/ctime"><span class="t-lines"><span>ctime</span><span>ctime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/strftime.html" title="c/chrono/strftime"><span class="t-lines"><span>strftime</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/wcsftime.html" title="c/chrono/wcsftime"><span class="t-lines"><span>wcsftime</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/gmtime.html" title="c/chrono/gmtime"><span class="t-lines"><span>gmtime</span><span>gmtime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/localtime.html" title="c/chrono/localtime"><span class="t-lines"><span>localtime</span><span>localtime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/mktime.html" title="c/chrono/mktime"><span class="t-lines"><span>mktime</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 常量</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/CLOCKS_PER_SEC.html" title="c/chrono/CLOCKS PER SEC"><span class="t-lines"><span>CLOCKS_PER_SEC</span></span></a></div></div></td></tr>
<tr class="t-nv-h1"><td colspan="5"> 类型</td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/tm.html" title="c/chrono/tm"><span class="t-lines"><span>tm</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/time_t.html" title="c/chrono/time t"><span class="t-lines"><span>time_t</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/clock_t.html" title="c/chrono/clock t"><span class="t-lines"><span>clock_t</span></span></a></div></div></td></tr>
<tr class="t-nv"><td colspan="5"><div class="t-nv-ln-table"><div><a href="chrono/timespec.html" title="c/chrono/timespec"><span class="t-lines"><span>timespec</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div></td></tr>
</table></div><div></div></div></div></div><div class="t-navbar-sep"> </div></div>
<h3><span class="mw-headline" id=".E5.87.BD.E6.95.B0">函数</span></h3>
<table class="t-dsc-begin">

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E6.97.B6.E9.97.B4.E6.93.8D.E7.BA.B5">  时间操纵 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;time.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/difftime.html" title="c/chrono/difftime"> <span class="t-lines"><span>difftime</span></span></a></div></div>
</td>
<td>   计算时间差 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/time.html" title="c/chrono/time"> <span class="t-lines"><span>time</span></span></a></div></div>
</td>
<td>   返回纪元开始经过的当前系统日历时间 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/clock.html" title="c/chrono/clock"> <span class="t-lines"><span>clock</span></span></a></div></div>
</td>
<td>   返回未加工的程序启动时开始经过的处理器时间 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/timespec_get.html" title="c/chrono/timespec get"> <span class="t-lines"><span>timespec_get</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   返回基于给定时间基底的日历时间  <br> <span class="t-mark">(函数)</span> </td></tr>

<tr>
<td colspan="2"> <h5> <span class="mw-headline" id=".E6.A0.BC.E5.BC.8F.E8.BD.AC.E6.8D.A2">  格式转换 </span></h5>
</td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;time.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/asctime.html" title="c/chrono/asctime"> <span class="t-lines"><span>asctime</span><span>asctime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   将 <code>struct tm</code> 对象转换成文本表示 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/ctime.html" title="c/chrono/ctime"> <span class="t-lines"><span>ctime</span><span>ctime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   将 <code>struct time_t</code> 对象转换成文本表示 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/strftime.html" title="c/chrono/strftime"> <span class="t-lines"><span>strftime</span></span></a></div></div>
</td>
<td>  将 <code>struct tm</code> 对象转换成自定义文本表示 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;wchar.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/wcsftime.html" title="c/chrono/wcsftime"> <span class="t-lines"><span>wcsftime</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span></span></div></div>
</td>
<td>  将 <code>struct tm</code> 对象转换成自定义宽字符文本表示 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;time.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/gmtime.html" title="c/chrono/gmtime"> <span class="t-lines"><span>gmtime</span><span>gmtime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   将从纪元开始的时间转换成以协调世界时（UTC）表示的日历时间 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/localtime.html" title="c/chrono/localtime"> <span class="t-lines"><span>localtime</span><span>localtime_s</span></span></a></div><div><span class="t-lines"><span></span><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   将从纪元开始的时间转换成以本地时间表示的日历时间 <br> <span class="t-mark">(函数)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/mktime.html" title="c/chrono/mktime"> <span class="t-lines"><span>mktime</span></span></a></div></div>
</td>
<td>   将日历时间转换成纪元开始经过的时间 <br> <span class="t-mark">(函数)</span> </td></tr>
</table>
<h3><span class="mw-headline" id=".E5.B8.B8.E9.87.8F">常量</span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;time.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/CLOCKS_PER_SEC.html" title="c/chrono/CLOCKS PER SEC"> <span class="t-lines"><span>CLOCKS_PER_SEC</span></span></a></div></div>
</td>
<td>   处理器每秒的时间计数 <br> <span class="t-mark">(宏常量)</span> </td></tr>
</table>
<h3><span class="mw-headline" id=".E7.B1.BB.E5.9E.8B">类型</span></h3>
<table class="t-dsc-begin">

<tr class="t-dsc-header">
<td colspan="2"> <div>定义于头文件 <code>&lt;time.h&gt;</code> </div>
</td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/tm.html" title="c/chrono/tm"> <span class="t-lines"><span>tm</span></span></a></div></div>
</td>
<td>   日历时间类型 <br> <span class="t-mark">(结构体)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/time_t.html" title="c/chrono/time t"> <span class="t-lines"><span>time_t</span></span></a></div></div>
</td>
<td>   从纪元开始的日历时间类型 <br> <span class="t-mark">(typedef)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/clock_t.html" title="c/chrono/clock t"> <span class="t-lines"><span>clock_t</span></span></a></div></div>
</td>
<td>   从时点开始的处理器时间类型 <br> <span class="t-mark">(typedef)</span> </td></tr>

<tr class="t-dsc">
<td>  <div class="t-dsc-member-div"><div><a href="chrono/timespec.html" title="c/chrono/timespec"> <span class="t-lines"><span>timespec</span></span></a></div><div><span class="t-lines"><span><span class="t-mark-rev t-since-c11">(C11)</span></span></span></div></div>
</td>
<td>   单位为秒和纳秒的时间  <br> <span class="t-mark">(结构体)</span> </td></tr>
</table>
<h3><span class="mw-headline" id=".E5.BC.95.E7.94.A8">引用</span></h3>
<div class="t-ref-std-11">
<ul><li> C11 standard (ISO/IEC 9899:2011): 
</li></ul>
<dl><dd><ul><li> 7.27 Date and time &lt;time.h&gt; (p: 388-397)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.29.5.1 The wcsftime function (p: 439-440)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.31.14 Date and time &lt;time.h&gt; (p: 456)
</li></ul>
</dd></dl>
<div class="t-ref-std-c99">
<ul><li> C99 standard (ISO/IEC 9899:1999): 
</li></ul>
<dl><dd><ul><li> 7.23 Date and time &lt;time.h&gt; (p: 338-347)
</li></ul>
</dd></dl>
<dl><dd><ul><li> 7.24.5.1 The wcsftime function (p: 385-386)
</li></ul>
</dd></dl>
<div class="t-ref-std-c89">
<ul><li> C89/C90 standard (ISO/IEC 9899:1990): 
</li></ul>
<dl><dd><ul><li> 4.12 DATE AND TIME &lt;time.h&gt; 
</li></ul>
</dd></dl>
</div>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">参阅</span></h3>
<table class="t-dsc-begin">

</table></div>
</div>

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